CN203056672U - Photovoltaic direct-current off-grid system - Google Patents
Photovoltaic direct-current off-grid system Download PDFInfo
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- CN203056672U CN203056672U CN2013200626177U CN201320062617U CN203056672U CN 203056672 U CN203056672 U CN 203056672U CN 2013200626177 U CN2013200626177 U CN 2013200626177U CN 201320062617 U CN201320062617 U CN 201320062617U CN 203056672 U CN203056672 U CN 203056672U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The utility model relates to a photovoltaic direct-current off-grid system, comprising a photovoltaic cell array, a photovoltaic controller connected with the photovoltaic cell array, a storage cell connected with the photovoltaic controller, a low-voltage converting circuit connected with the photovoltaic controller and used for outputting a low-voltage direct-current voltage, and a high-voltage boost circuit connected with the photovoltaic controller and used for outputting a high-voltage direct-current voltage. According to the photovoltaic direct-current off-grid system of the utility model, the low-voltage converting circuit and the high-voltage boost circuit which are respectively used for outputting the low-voltage direct-current voltage and the high-voltage direct-current voltage are directly connected to the photovoltaic controller, thus high and low voltage separated and direct power supply can be realized, and the program of electric power conversion is simplified, thereby contributing to raising a utilization rate of photovoltaic power generation and reducing cost.
Description
Technical field
The utility model relates to a kind of photovoltaic DC from the net system.
Background technology
Renewable and clean energy resource is to have one of material technical field in the 21 century development of world economy most, has superiority such as ubiquity, nexhaustible, non-environmental-pollution, plays a greater and greater role in the world and China's energy sustainable development.Photovoltaic system is to utilize solar module and other auxiliary equipment solar energy to be converted to the system of electric energy.
At present common photovoltaic off-grid system is DC power-supply system and ac power supply system nothing more than, and DC power-supply system is used from net in the middle low power section generally speaking, and ac power supply system uses (seeing shown in Figure 1) in big slightly power section from net.
Domestic loads power supply commonly used all is alternating current, but see that internally most input circuit all is to power (seeing shown in Figure 2) after by a rectification circuit alternating current being made into direct current, and a lot of loads of in fact using all are to realize power supply by the direct current mode.Therefore can consider to realize power supply by DC distribution separately.
Present illuminating light-emitting diode (Light Emitting Diode, LED), electricity-saving lamp (Compact Fluorescent Lamp, CFL) can realize low-voltage DC supply, dc micro-motor such as DC fan, straightway pump is used also very extensive, because the power of above-mentioned low-power load is all smaller, so the high voltage supply that is higher than with the obvious advantage of low-voltage power supply.
Present domestic TV, computer, charger for mobile phone, and more and more household appliances all are to adopt switch power technology to become direct current to power then (seeing shown in Figure 3) AC rectification, therefore can realize the home electric operate as normal by the direct current supply mode fully in off-grid photovoltaic system.
Frequency converter class household electrical appliances all are that frequency converter class correlation technique is carried out variable frequency control to direct current machine owing to what adopt, the input power unit also all is to adopt unidirectional or the three-phase commutation bridge technology becomes direct current with AC rectification, carry out work (seeing shown in Figure 4) then, therefore also can realize the home electric power supply by the direct current supply mode.
Because high frequency generally adopts the control model of voltage-type from net type inverter, needs very big electric capacity that energy is provided on the main dc bus, the high pressure bridge type inverse switch pipe loss of dc bus is the principal element that the restriction inverter efficiency promotes always.If the power consumption of inverter itself in the consideration, this will be a very big loss.
Therefore, be necessary to provide a kind of improved photovoltaic DC from the net system to address the above problem.
The utility model content
The purpose of this utility model is to provide a kind of and realizes separately directly power supply of high-low pressure, and can improve the utilance of photovoltaic generation, the photovoltaic DC that reduces cost from the net system.
For realizing aforementioned purpose, the utility model adopts following technical scheme: a kind of photovoltaic DC is from the net system, comprises photovoltaic battery array, the photovoltaic controller that is connected with described photovoltaic battery array, the storage battery that is connected with described photovoltaic controller and is connected with described photovoltaic controller respectively and in order to the low voltage conversion circuit of exporting low-voltage dc voltage with in order to export the high voltage step-up circuit of high-voltage dc voltage.
As further improvement of the utility model, described high voltage step-up circuit comprises the push-pull type booster circuit that is connected with described photovoltaic controller, the full bridge rectifier that is connected with described push-pull type booster circuit.
As further improvement of the utility model, described high voltage step-up circuit comprises the full-bridge boost circuit that is connected with described photovoltaic controller, the full bridge rectifier that is connected with described full-bridge boost circuit.
As further improvement of the utility model, described photovoltaic controller is the MPPT controller.
The beneficial effects of the utility model are: photovoltaic DC of the present utility model is realized low voltage conversion circuit and the high voltage step-up circuit of output low-voltage dc voltage and high-voltage dc voltage respectively by direct connection behind photovoltaic controller from the net system, thereby can realize separately directly power supply of high-low pressure, simplified the program of power converter, thus help to improve photovoltaic generation utilance, reduced cost.
Description of drawings
Fig. 1 is that photovoltaic exchanges structured flowchart from the net system in the prior art.
Fig. 2 be in the prior art photovoltaic DC from the structured flowchart of net system.
Fig. 3 is Switching Power Supply figure of the prior art.
Fig. 4 is the circuit diagram of frequency converter of the prior art.
Fig. 5 is that the utility model photovoltaic DC is from the structured flowchart of net system.
Fig. 6 be among Fig. 5 photovoltaic DC from the structural representation of net system one preferred embodiment.
Fig. 7 be among Fig. 5 photovoltaic DC from the structural representation of another preferred embodiment of net system.
Embodiment
See also Fig. 5, the photovoltaic DC among the utility model one embodiment comprises photovoltaic battery array 1, photovoltaic controller 2, storage battery 3, low voltage conversion circuit 4 and high voltage step-up circuit 5 from the net system.
Low voltage conversion circuit 4 receives wherein one road direct voltage of photovoltaic controller 2 outputs and exports low-voltage dc voltage, and the low-voltage dc voltage of its output is lower than trouble free service voltage, and wherein this trouble free service magnitude of voltage is 36V.The low-voltage dc voltage that this low voltage conversion circuit 4 is exported uses for low-power load 62, as LED, CFL etc.Should can adopt Boost circuit or Buck circuit by low voltage conversion circuit 4.
High voltage step-up circuit 5 receives another road direct voltage of photovoltaic controller 2 outputs and exports high-voltage dc voltage, the high-voltage dc voltage of its output is higher than trouble free service voltage, generally about 300V, thereby guarantee to use greater than high power load 61, as domestic TV, computer etc.
See also shown in Figure 6, wherein among the embodiment, high voltage step-up circuit 5 comprises the push-pull type booster circuit 51 that is connected and receives photovoltaic controller 2 DC circuit with photovoltaic controller 2, is connected and exports the full bridge rectifier 52 of the above voltage of 310V with push-pull type booster circuit 51.Realize that by this high voltage step-up circuit 5 the DC-DC boosting inverter is raised to direct current 310V with storage battery 3 voltages, to guarantee greater than high power load 61 demand alternating current 220V crest voltages.
See also shown in Figure 7ly, another above-mentioned high voltage step-up circuit 5 can also adopt following circuit to realize: high voltage step-up circuit 5 comprise be connected with photovoltaic controller 2 and export the above voltage of 310V full-bridge boost circuit 53, the full bridge rectifier 54 that is connected with full-bridge boost circuit 53.Realize that by this high voltage step-up circuit 5 the DC-DC boosting inverter is raised to direct current 310V with storage battery 3 voltages, to guarantee greater than power termination 61 demand alternating current 220V crest voltages.
In sum, above-mentioned photovoltaic DC passes through directly to connect low voltage conversion circuit 4 and the high voltage step-up circuit 5 of realizing output low-voltage dc voltage and high-voltage dc voltage respectively in photovoltaic controller 2 backs from the net system, thereby can realize separately directly power supply of high-low pressure, simplified the program of power converter, thus help to improve photovoltaic generation utilance, reduced cost.
Although be the example purpose, preferred implementation of the present utility model is disclosed, but those of ordinary skill in the art will recognize that under situation about not breaking away from by the disclosed scope and spirit of the present utility model of appending claims, various improvement, increase and replacement are possible.
Claims (4)
1. a photovoltaic DC is from the net system, comprise photovoltaic battery array, the photovoltaic controller that is connected with described photovoltaic battery array and the storage battery that is connected with described photovoltaic controller, it is characterized in that: described photovoltaic DC also comprises from the net system and being connected with described photovoltaic controller respectively and in order to the low voltage conversion circuit of exporting low-voltage dc voltage with in order to export the high voltage step-up circuit of high-voltage dc voltage.
2. photovoltaic DC according to claim 1 is characterized in that from the net system: described high voltage step-up circuit comprises the push-pull type booster circuit that is connected with described photovoltaic controller, the full bridge rectifier that is connected with described push-pull type booster circuit.
3. photovoltaic DC according to claim 1 is characterized in that from the net system: described high voltage step-up circuit comprises the full-bridge boost circuit that is connected with described photovoltaic controller, the full bridge rectifier that is connected with described full-bridge boost circuit.
According to claim 2 or 3 described photovoltaic DCs from the net system, it is characterized in that: described photovoltaic controller is the MPPT controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200626177U CN203056672U (en) | 2013-02-04 | 2013-02-04 | Photovoltaic direct-current off-grid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200626177U CN203056672U (en) | 2013-02-04 | 2013-02-04 | Photovoltaic direct-current off-grid system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203056672U true CN203056672U (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200626177U Expired - Lifetime CN203056672U (en) | 2013-02-04 | 2013-02-04 | Photovoltaic direct-current off-grid system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752657A (en) * | 2019-11-05 | 2020-02-04 | 浙江大学 | Power supply circuit based on multi-path parallel input power supply and power supply control method |
-
2013
- 2013-02-04 CN CN2013200626177U patent/CN203056672U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752657A (en) * | 2019-11-05 | 2020-02-04 | 浙江大学 | Power supply circuit based on multi-path parallel input power supply and power supply control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215000 Suzhou high tech Industrial Development Zone, Jiangsu Province, Lu Lu, No. 199, No. Co-patentee after: CANADIAN SOLAR MANUFACTURING (CHANGSHU) Inc. Patentee after: CSI SOLAR POWER GROUP Co.,Ltd. Address before: 215000 Suzhou high tech Industrial Development Zone, Jiangsu Province, Lu Lu, No. 199, No. Co-patentee before: CANADIAN SOLAR MANUFACTURING (CHANGSHU) Inc. Patentee before: CSI SOLAR POWER (CHINA) Inc. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee after: Atlas sunshine Power Group Co.,Ltd. Patentee after: CANADIAN SOLAR MANUFACTURING (CHANGSHU) Inc. Address before: 215000 No. 199 Lu Shan Road, Suzhou hi tech Industrial Development Zone, Suzhou, Jiangsu Patentee before: CSI SOLAR POWER GROUP Co.,Ltd. Patentee before: CANADIAN SOLAR MANUFACTURING (CHANGSHU) Inc. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |